I have an .hdd file I created from my old PC that I have backed up on my LaCie external drive. I copied the file from the LaCie to my Parallels desktop and then tried to migrate the file clicking on File>import and then using the Parallels transporter. I select "single virtual disk" and then browse to the .hdd file. After selecting "Migrate" it runs for a while until I received the following message: "Unable to open virtual disk image" Any help or suggestions would be appreciated